Will there be a real professional/enterprise version???
I think there's a reason MS introduced the playsumer version of Win10 first - those rental fees are where they're looking for most of their revenue. Unless they do something truly OUTSTANDING for the pro/enterprise market, companies are going to hold onto Win7 until it goes end-of-life anyway - because there's no business case for replacing something that's working well, and testing/verifying a new OS with current business procedures is a pain to be put off until necessary.
As for doing something truly outstanding, their track record at that can be seen in the evolution of MS Office (okay, I'm used to the ribbon now, but it still seems pointless to me). I have my own copy of Office 2010, work "had to" move on to Office 2013, so I can see its inferiority on a daily basis.
<where's the "crusty curmedgeon" icon?>